Ar745 Router - Allied Telesis AR Series Hardware Reference Manual

48
Redundant Power Supply (RPS)
AC models of the AT-AR740 can be used in conjunction with the AT-RPS 740.
Each AT-RPS 740 can provide power supply and mains circuit redundancy for
up to two AT-AR740s. For more information on the AT-RPS 740, see "AT-RPS
740" on page 54.
For connection to an AT-RPS 740, the AT-AR740 Router has a female DB25
connector on its rear panel (Figure 20 on page 48). Pin outs for the connector
are listed in Table 21 on page 48.
Figure 20: DB25 female connector pinout for an RPS on the AT-AR740 rear panel
Pin 13
Pin 25
Table 21: DB25 RPS power connector pin out on the AT-AR740.
Pin
1, 25
2, 14
3-5, 15-17
6-8, 18-20
9
10
11
12
13
21
22
23
24

AR745 Router

The AT-AR745 router consists of a base CPU card, enclosure, and power
supply. The base CPU card supports two 10/100 autosensing Ethernet LAN
ports and two asynchronous RS-232 ports.
AT-AR740s have a Network Service Module (NSM) bay and two Port Interface
Card (PIC) bays. The NSM bay is PCI based to provide support for a number of
higher density or higher performance interfaces. NSMs with fixed ports are
available (e.g., AT-AR041 and AT-AR042 BRI S/T NSMs) as are NSMs with PIC
bays (e.g., AT-AR040 4 PIC NSM) for flexible expansion options. The PIC bays
and the 4-PIC NSM can accommodate combinations of the following PICs:
AT-AR020 PRI E1/T1 PIC, one Primary Rate E1/T1 port.
AT-AR021(S) BRI-S/T PIC, one Basic Rate ISDN S/T port.
Pin 1
Pin 14
A740db25
Function
Keying
+12V
+5V
0V
-12V
VCC
Main PSU error
Main fan error
RPS disconnected
Sense 0V
Sense +5V
RPS PSU error
RPS fan error
AR Router
Direction
-
input
input
input
input
output
output
output
input
output
output
output
input
C613-03031-01 REV E